Vise-jaw attachment.



L. S. STARRETT.

VISB JAW ATTACHMENT.

APPLICATION IILBD MAY 31, 1910.

1,006,509.. Patented 001. 24, 1911.

l WT/VESSES WVQV'TUE Y I B W To ell zbhom it may concern:

Be it'known that I, LAROY S. STARRETT, a citizen of the United States,

umrnnsrAras PATENT OFFICE.

I LAEOY S. STARRETT, 0F ATHOL; MASSACHUSETTS, ASSIGNOR T0 L. S. STAIRQRCETT eemreirr,

OF ATHOL, MASSACHUSETTS, A GORPORATION OF MASSACHUSETTS.

VISE-J AW ATTACHMENT.

intesta- Speeification of Zetters Patent.

Patented Oct. 24, 1911.

Application filed May 31, 1910; 'Serial No. 564,054.

residing at Athol, county of Worcester, Commonwealth of iMassachusetts, have invented certain new and useful Improvements in .Vise-J aw Attachments, of which the following is a specification. a

This invention relates to vise .jaws, and

particularly to an auxiliary vise jaw or aw attachment adapted to automatically conform to and hold firmly tapering pieces of work of irregular shapes which have to be gripped'in a vise.

The difficulty of holding work of irregular shape, and particularly small pieces of work having such irregularities, is well .knownand it is the object of the present invention to provide means for firmly holding work of this nature without danger of mutilation and in a manner permitting the greatest accessibility and freedom in operation. This I accomplish by providing a supplemental jaw capable of adjustment relative to the opposite jaw, so as to allow for any taper, slant or other irregularity'of surface upon which it may be necessary to clamp.

As illustrative of my invention I shall describe in the following specification an embodiment which I find well adapted to practical use and to manufacture. In the drawings which form a part of the specification, *1 have shown this embodiment and throughout specification and drawings like reference numerals are employed to indicate corresponding parts.

In the drawings Figure 1 is a plan view of vise equipped with one'form of my invention, Fig. 2 is a side view of the same, Fig. 3. is a side view showing an adaptation to the different form of, work, Fig. 4 is aplan view of the attachment shown in Fig.

'1, removed from the vise, Fig. 5 is a se'ctional view on the line 5-5, Fig. 4, and Fig. 6 is a plan view of the attachment shown in Fig. 3. 4

My attachment may be mounted on either of the jaws indicated as 1 or 2 of a vise and, when so mounted, will hold a piece of work, as 4, between itself and the opposite jaw.

My attachment consists of a supporting block or plate. 5 having its rear surface adapted to'restalong the face of the jaw and having mounted on its outer face auxiliary jaw pieces 6. These jaw pieces 6 are vertically grooved between their ends and oppositely beveled on each side of the groov= ing to give a rocking clearance. The front face -of the support 5 is also vertically grooved near each end and betweenthese grooves, on the support 5 and the jaws 6, as shown in Fig. 5, are pintles 7.

12 are opposite heads set on the ends of the pintle and having flanged edges which engage the grooves 11 which are concentrically arranged about the pintle grooves on both the jaws 6 and the block 5. This arrangement gives a very strong joint as the thrust of the jaw 6 is taken up laterally through the pintle 7 and borne by the grooved face of the block 5. The block 5 may be provided with only one of the jaws 6 or may have two, as shown. i 8 is a top plate fastened to the block 5 by screws 9 and having a nib 10 which enters the recess 3 on the upper side of the jaw so that the block 5 will be centrally hungthereon. The top plate 8 is narrow as compared with the length of the vise jaw,

thus leaving a broad space on each side along which the work may be filled up flush with the top of the vise.

The construction shown in Figs. 1, 2,. 4 and 5 show the arrangement for accommodating work with lateral irregularities.

In Figs, 3 and 6'1 have shown a form. of construction adapted to accommodate i-rregularities vertically. In this form the supporting block or plate 5 is transversely grooved, as is also the jaw 6 and between these grooves the pintle 7 is held. The rear face of the jaw 6 and the front face of the block 5 are preferably both oppositely beveled on each side of the pintle groove to allow the jaw to rock in either direction out of the perpendicular. The coil spring 13, which has one end resting in a socket in the block 5 and the other in a corresponding recess in the aw 7 tends normally to tip the 100 jaw 6 up. As shown in Fig. 1, when such a piece of work as 4 is put into the vise the auxiliary jaw pieces 6 tip inward to engage it symmetrically and firmly. With a piece of work such as 4 the j aw 6 tips up to take 105 care of any vertical taper or incline.

Various modifications in the structure and operation of my device may obviously be made without departing from the spirit of my invention.

What I, therefore, claim and desire to secure by Letters Patent is sup 1. An auxiliary attachment for a vise jaw comprising a-supp'orting block having a rear jaw engaging face and a forward centrally grooved means for attaching saidblock to a jaw, an auxiliary jaw having a forward work engaging face and a centrally grooved rear face, said block and said jaw each having a kerf cut in each end, a pintle assembled between said grooves and a head on each end of said intle and having flanges engagingsaid ker s..

2. An attachmentpf the class described comprising a support, an auxiliary .work engaging jaw adjustably mounted on said port to hold its work engaging face at an angle thereto, a socket in adjacent faces of said support and said jaw, and a coiled spring having one end seated in each of said sockets for yieldingly holding said jaw relative to said support.

3. An attachment of the class described comprising a support, a pair of auxiliary work engaging aws pivotally mounted on said. support one said supporteach of said jaws being pivotally connected near its own outer end and being beveled on its rear face from its point of pivot toward its ends said supporting plate also being beveled from the point of pivot rearwardly, substantially" as shown and described.

4:. .A vise jaw attachment comprising a supporting block, a central overhanging plate on said support and of a less w dth than the length of said plate and adapted to engage the top of a vise jaw and ans-auxiliary work engaging jaw adjustably mounted on said supporting block.

In testimony whereof, I afiix my signature in presence of two witnesses.

f LAROY S. STARRETT.

Witnesses: v

FRANK E. WING, MARSHALL B. WATERMAN.

adjacent to each end of 

